Handle of a ball valve



FIG. 1 is an upper perspective view of the handle of a ball valve showing my design.

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is an opposite side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is an upper perspective view thereof, the broken line showings being environmental only and forming no part of the claimed design; and,

FIG. 9 is an another upper perspective view thereof, the broken lines showings being environmental only and forming no part of the claimed design. 

I claim the ornamental design for a handle of a ball valve, as shown and described. 